Elm: functional programming in your browser

Alex Troush

DisclaimerTrolling is a part of show and not (mostly!) reflect the opinion of the author

Function Concepts you need to know nowImmutable data

First-class functions

Pure Functions

Recursion

Elm hello worldimport Html exposing (span, text)import Html.Attributes exposing (class)

main = span [class "welcome-message"] [text "Hello, World!"]

Html AS a FUNCTIONma

Types

Types

Types

Elm Architecture

MODEL -> UPDATE -> VIEW

1 billion dollar application

GIF LOADING APPCats

model

VIEW

UPDATE

Adding cool stuff

UPDATE

HTTP STUFF

Tooling

ELM SEXY ERROR MESSAGESfoo = List.nap

Elm elm elm

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